| Primary address | 11 Mansion Hill Drive, Syosset |
| Zip code | 11791 |
| County | Nassau |
| Town/City | Oyster Bay |
| Village (swiss code) | Muttontown |
| Parcel ID | 15-206-80 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Building sqft | 8,500 |
| Building class | One Family Homeowner's Unit (210.21) |
| Land | Primary site |
| Topography | Level |
| Acreage | 7.01 |
| Buildings on lot | 1 |
| Year built | 1903 |
| Stories | 2 |
| Style | Mansion, Estate |
| Rooms | 21 |
| Bathrooms | 8 |
| Half bathrooms | 1 |
| Attic | Unfinished |
| Basement | Full |
| Exterior wall | Brick |
| Heating type | Central/AC |
| Heating system | Central w ac |
| Fireplace | 6 |
| Zoning district | Register (See more on map) |
| School district | Locust Grove |
View more neighborhood information such as transportation, nearby schools and risk designations in the dedicated tab.
Property reports include comprehensive occupancy, improvement and development information (where available).
Create a free account to access valuable data points such as:
11 Mansion Hill Drive, Syosset, NY 11791 was built in 1903 and has a total of 8,500 square feet.
What is the assessed value of 11 Mansion Hill Drive, Syosset, NY 11791 and the property tax paid?Assessed at $2,418, the tax amount paid for 11 Mansion Hill Drive, Syosset, NY 11791 is $66,691.
When was 11 Mansion Hill Drive, Syosset, NY 11791 last sold and what was the last sale price?11 Mansion Hill Drive, Syosset, NY 11791 was last sold in 11/04/2022 for $2,940,000.
View detailed property contacts like owners, building management, representatives from permits and tenants with a free account.
Create a free account to view the complete sales history for 11 Mansion Hill Drive, Syosset, including title documents, transfer conditions, mortgages and liens.
*Here are the three most recent sales for this property.
To view the complete history of deeds, mortgages, assignments of leases and rents, and more, sign up for free. Available data goes back to 1966.
R: Recorded date
D: Document date
Access detailed property tax data for 11 Mansion Hill Drive, Syosset, NY 11791. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year | 2026 |
| Property tax | $66,691 |
| Tax class | Register |
| Market value | $2,418,000 |
| Assessed value | $2,418 |
Here's the assessment & property tax history for 11 Mansion Hill Drive, Syosset, including the evolution of the total tax rate and corresponding property tax.
| Year | Market value | Assessment value | Total tax rate | Property tax | Year over year change |
|---|---|---|---|---|---|
| 2026 | $2,418,000 | $2,418 | 2758.114 | $66,691 | -18.12% |
| 2025 | $3,042,000 | $3,042 | 2677.626 | $81,453 | -15.24% |
| 2024 | $6,944,134 | $3,373 | 2849.174 | $96,103 | -4.83% |
| 2023 | $3,418,000 | $3,418 | 2954.471 | $100,984 | -3.39% |
| 2022 | $3,225,000 | $3,225 | 3241.063 | $104,524 | -5.56% |
The complete history of permits filed for 11 Mansion Hill Drive, Syosset, including new construction or demolition permits, plus any work pertaining to plumbing, heating and sprinkler systems is available with a free account. Available data goes back to 1990.
Create a free account to unlock extended information for 11 Mansion Hill Drive, Syosset, including whether it's located in FEMA flood zones, floodways or special flood hazard areas, as well as the Coastal barriers resources system area (COBRA).
| FEMA flood zone(s) | X (See more on map) |
Access the detailed traffic volume map for 11 Mansion Hill Drive, Syosset to see estimated average daily traffic on streets surrounding the property as well as the types of properties in its vicinity.
| View daily traffic map |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Robbins Lane Elementary School | 9 | Public | K-5 | 500 | 0.44 |
| George A Jackson School | 9 | Public | K-5 | 462 | 1.12 |
| South Grove Elementary School | 9 | Public | K-5 | 416 | 1.23 |
| St Edward Confessor School | NR | Private | PK-8 | 265 | 1.53 |
| St Edward Confessor School | NR | Private | PK-8 | 265 | 1.53 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Jericho Middle School | 9 | Public | 6-8 | 810 | 1.06 |
| Long Island Lutheran Middle & High School | NR | Private | 6-12 | 439 | 1.39 |
| St Edward Confessor School | NR | Private | PK-8 | 265 | 1.53 |
| H B Thompson Middle School | 9 | Public | 6-8 | 997 | 1.83 |
| P.S. 256 | NR | Public | PK, K-12 | 500 | 2.27 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Jericho Senior High School | 10 | Public | 9-12 | 1,258 | 1.06 |
| Long Island Lutheran Middle & High School | NR | Private | 6-12 | 439 | 1.39 |
| P.S. 256 | NR | Public | PK, K-12 | 500 | 2.27 |
| Harmony Heights School | NR | Private | 8-12 | 0 | 2.28 |
| Harmony Heights School | NR | Private | 8-12 | 74 | 2.30 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 11 Mansion Hill Drive, Syosset.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 15 Westgate Rd, Syosset | 6,011 | 03/26/2018 | $3,315,000 |
| 1 Earle Dr, Syosset | 4,892 | 07/13/2012 | $1,700,000 |
| 5 Kingwood CT, Syosset | 6,799 | 03/14/2019 | |
| 3 Bromley CT, Syosset | 7,241 | 11/05/2010 | $1,300,000 |
| 1 Kingwood CT, Syosset | 6,144 | 04/12/2023 | $4,250,000 |
| 11 Earle Dr, Syosset | 4,650 | 06/15/2022 | |
| 2216 Route 106, Syosset | 8,969 | 06/28/2024 | $3,900,000 |
| 6 Kingwood CT, Syosset | 6,169 | 03/15/2025 | $4,000,000 |
| 2 Kingwood CT, Syosset | 6,453 | 08/24/2021 | $2,800,000 |
| 35 Stone Hill Dr, Syosset | 8,155 | 07/19/2018 | $4,350,000 |
| 1888 Muttontown Rd, Syosset | 11/13/2009 | $3,212,000 | |
| 2210 Route 106, Syosset | 5,907 | 02/22/2021 | |
| 5 Earle Dr, Syosset | 4,862 | 07/30/2008 | $2,308,196 |
| 7 Mansion Hill Dr, Syosset | 6,134 | 11/06/2019 | $950,000 |
| 1 Bromley CT, Syosset | 6,953 | 07/16/2015 | $4,065,705 |
| 7 Kingwood CT, Syosset | 7,763 | 10/02/2009 | $5,379,500 |
| 1860 Muttontown Rd, Syosset | 7,010 | 02/06/2024 | |
| 9 Mansion Hill Dr, Syosset | 8,488 | 01/20/2017 | $4,130,000 |
| 5 Mansion Hill Dr, Syosset | 7,680 | 09/26/2024 | $5,725,000 |